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1da177e4 LT |
1 | /* drivers/atm/eni.h - Efficient Networks ENI155P device driver declarations */ |
2 | ||
3 | /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */ | |
4 | ||
5 | ||
6 | #ifndef DRIVER_ATM_ENI_H | |
7 | #define DRIVER_ATM_ENI_H | |
8 | ||
9 | #include <linux/atm.h> | |
10 | #include <linux/atmdev.h> | |
11 | #include <linux/sonet.h> | |
12 | #include <linux/skbuff.h> | |
13 | #include <linux/time.h> | |
14 | #include <linux/pci.h> | |
15 | #include <linux/spinlock.h> | |
16 | #include <asm/atomic.h> | |
17 | ||
18 | #include "midway.h" | |
19 | ||
20 | ||
21 | #define KERNEL_OFFSET 0xC0000000 /* kernel 0x0 is at phys 0xC0000000 */ | |
22 | #define DEV_LABEL "eni" | |
23 | ||
24 | #define UBR_BUFFER (128*1024) /* UBR buffer size */ | |
25 | ||
26 | #define RX_DMA_BUF 8 /* burst and skip a few things */ | |
27 | #define TX_DMA_BUF 100 /* should be enough for 64 kB */ | |
28 | ||
29 | #define DEFAULT_RX_MULT 300 /* max_sdu*3 */ | |
30 | #define DEFAULT_TX_MULT 300 /* max_sdu*3 */ | |
31 | ||
32 | #define ENI_ZEROES_SIZE 4 /* need that many DMA-able zero bytes */ | |
33 | ||
34 | ||
35 | struct eni_free { | |
36 | void __iomem *start; /* counting in bytes */ | |
37 | int order; | |
38 | }; | |
39 | ||
40 | struct eni_tx { | |
41 | void __iomem *send; /* base, 0 if unused */ | |
42 | int prescaler; /* shaping prescaler */ | |
43 | int resolution; /* shaping divider */ | |
44 | unsigned long tx_pos; /* current TX write position */ | |
45 | unsigned long words; /* size of TX queue */ | |
46 | int index; /* TX channel number */ | |
47 | int reserved; /* reserved peak cell rate */ | |
48 | int shaping; /* shaped peak cell rate */ | |
49 | struct sk_buff_head backlog; /* queue of waiting TX buffers */ | |
50 | }; | |
51 | ||
52 | struct eni_vcc { | |
53 | int (*rx)(struct atm_vcc *vcc); /* RX function, NULL if none */ | |
54 | void __iomem *recv; /* receive buffer */ | |
55 | unsigned long words; /* its size in words */ | |
56 | unsigned long descr; /* next descriptor (RX) */ | |
57 | unsigned long rx_pos; /* current RX descriptor pos */ | |
58 | struct eni_tx *tx; /* TXer, NULL if none */ | |
59 | int rxing; /* number of pending PDUs */ | |
60 | int servicing; /* number of waiting VCs (0 or 1) */ | |
61 | int txing; /* number of pending TX bytes */ | |
62 | struct timeval timestamp; /* for RX timing */ | |
63 | struct atm_vcc *next; /* next pending RX */ | |
64 | struct sk_buff *last; /* last PDU being DMAed (used to carry | |
65 | discard information) */ | |
66 | }; | |
67 | ||
68 | struct eni_dev { | |
69 | /*-------------------------------- spinlock */ | |
70 | spinlock_t lock; /* sync with interrupt */ | |
71 | struct tasklet_struct task; /* tasklet for interrupt work */ | |
72 | u32 events; /* pending events */ | |
73 | /*-------------------------------- base pointers into Midway address | |
74 | space */ | |
75 | void __iomem *phy; /* PHY interface chip registers */ | |
76 | void __iomem *reg; /* register base */ | |
77 | void __iomem *ram; /* RAM base */ | |
78 | void __iomem *vci; /* VCI table */ | |
79 | void __iomem *rx_dma; /* RX DMA queue */ | |
80 | void __iomem *tx_dma; /* TX DMA queue */ | |
81 | void __iomem *service; /* service list */ | |
82 | /*-------------------------------- TX part */ | |
83 | struct eni_tx tx[NR_CHAN]; /* TX channels */ | |
84 | struct eni_tx *ubr; /* UBR channel */ | |
85 | struct sk_buff_head tx_queue; /* PDUs currently being TX DMAed*/ | |
86 | wait_queue_head_t tx_wait; /* for close */ | |
87 | int tx_bw; /* remaining bandwidth */ | |
88 | u32 dma[TX_DMA_BUF*2]; /* DMA request scratch area */ | |
89 | int tx_mult; /* buffer size multiplier (percent) */ | |
90 | /*-------------------------------- RX part */ | |
91 | u32 serv_read; /* host service read index */ | |
92 | struct atm_vcc *fast,*last_fast;/* queues of VCCs with pending PDUs */ | |
93 | struct atm_vcc *slow,*last_slow; | |
94 | struct atm_vcc **rx_map; /* for fast lookups */ | |
95 | struct sk_buff_head rx_queue; /* PDUs currently being RX-DMAed */ | |
96 | wait_queue_head_t rx_wait; /* for close */ | |
97 | int rx_mult; /* buffer size multiplier (percent) */ | |
98 | /*-------------------------------- statistics */ | |
99 | unsigned long lost; /* number of lost cells (RX) */ | |
100 | /*-------------------------------- memory management */ | |
101 | unsigned long base_diff; /* virtual-real base address */ | |
102 | int free_len; /* free list length */ | |
103 | struct eni_free *free_list; /* free list */ | |
104 | int free_list_size; /* maximum size of free list */ | |
105 | /*-------------------------------- ENI links */ | |
106 | struct atm_dev *more; /* other ENI devices */ | |
107 | /*-------------------------------- general information */ | |
108 | int mem; /* RAM on board (in bytes) */ | |
109 | int asic; /* PCI interface type, 0 for FPGA */ | |
110 | unsigned int irq; /* IRQ */ | |
111 | struct pci_dev *pci_dev; /* PCI stuff */ | |
112 | }; | |
113 | ||
114 | ||
115 | #define ENI_DEV(d) ((struct eni_dev *) (d)->dev_data) | |
116 | #define ENI_VCC(d) ((struct eni_vcc *) (d)->dev_data) | |
117 | ||
118 | ||
119 | struct eni_skb_prv { | |
120 | struct atm_skb_data _; /* reserved */ | |
121 | unsigned long pos; /* position of next descriptor */ | |
122 | int size; /* PDU size in reassembly buffer */ | |
123 | dma_addr_t paddr; /* DMA handle */ | |
124 | }; | |
125 | ||
126 | #define ENI_PRV_SIZE(skb) (((struct eni_skb_prv *) (skb)->cb)->size) | |
127 | #define ENI_PRV_POS(skb) (((struct eni_skb_prv *) (skb)->cb)->pos) | |
128 | #define ENI_PRV_PADDR(skb) (((struct eni_skb_prv *) (skb)->cb)->paddr) | |
129 | ||
130 | #endif |